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kotlinlang

What kind of inheritance is this? I see it in Compose <https://developer.android.com/jetpack/compose/navigation#bottom-nav|docs>, but can't find its usage on Kotlin docs. Can a subclass (object) be defined inside the parent class?

```sealed class Screen(val route: String, @StringRes val resourceId: Int) {
    object Profile : Screen("profile", R.string.profile)
    object FriendsList : Screen("friendslist", R.string.friends_list)
}```


It’s normal inheritance.
The only difference is that you can be sure that `Profile` and `FriendsList` are the only subclasses of `Screen` and there are no others. That’s because it’s `sealed`.

<https://kotlinlang.org/docs/sealed-classes.html>

I don't know why the linked doc does not have an example like the given snippet.